flex 做的省市二級聯動

 

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundGradientColors="[#ffffff,#ffffff]">
3.     <mx:Script>
4.         <![CDATA[
5.             public function changeHandler(e:Event):void
6.             {
7.                 city.dataProvider=e.target.selectedItem.item;
8.                 city.selectedIndex=0;               
9.             }
10.         ]]>
11.     </mx:Script>
12.     <mx:XML id="xmlPC_linked" source="PC_linked.xml"/>
13.     <mx:Panel x="262" y="144" width="296" height="200">
14.         <mx:ComboBox  id="pro" dataProvider="{xmlPC_linked.node}" labelField="@label" change="changeHandler(event)"/>
15.         <mx:ComboBox  id="city" labelField="@label"/>       
16.     </mx:Panel>
17. </mx:Application>

 數據xml:PC_linked.xml

 

1. <?xml version="1.0" encoding="utf-8"?>
2. <root>
3.     <node label="北京市" type="0">
4.         <item label="東城區"/>
5.         <item label="西城區"/>
6.         <item label="朝陽區"/>
7.         <item label="海淀區"/>
8.     </node>
9.     <node label="上海市" type="0">
10.         <item label="黃浦區"/>
11.         <item label="盧灣區"/> 
12.     </node>
13.     <node label="湖南省" type="0">
14.         <item label="長沙"/>
15.         <item label="衡陽"/>      
16.     </node>
17.     <node label="廣東省" type="0">
18.         <item label="廣州市"/>
19.         <item label="深圳市"/>
20.     </node>
21. </root>